Shopify Setup Error Leads to Missed Sales Tax in 15 States
A Canadian Shopify merchant recently shared on Shopify’s support forum that their store had not been charging sales tax in 15 U.S. states. The problem? Their “Collect Sales Tax” settings weren’t correctly enabled, and Shopify’s support guidance left them confused. As a result, the seller had to cover the missed sales tax out of pocket — a costly mistake that highlights the risks of relying on default platform settings.
Written by Alex Lamachenka
Head of DemandGen
Published
What Happened
The merchant had been selling into the U.S. under the assumption that Shopify automatically handled all state-level sales tax requirements. But when they reviewed their account, they discovered that tax was not being collected in multiple states where they had sales.
Key issues they reported:
- Shopify’s tax settings were not applied consistently across states
- Enabling “Collect Sales Tax” must be done state by state — it is not automatic
- Support documentation and guidance from Shopify were not clear enough to prevent the error
By the time the issue was discovered, the merchant had to absorb the cost of uncollected tax, eroding profits and creating compliance concerns.
Why This Matters for Sellers
This case illustrates a problem many international merchants face when selling into the U.S.:
- Sales tax is state-driven — unlike Canada’s GST/HST, there’s no single federal system.
- Platform defaults don’t equal compliance — Shopify, like other ecommerce platforms, requires sellers to manually configure each state.
- Errors fall on the seller — states expect tax to be collected, even if the platform setup was incomplete.
For sellers outside the U.S., the complexity of 45+ states with sales tax obligations can be overwhelming. But ignoring or misconfiguring settings can result in either paying tax out of pocket or facing penalties down the line.
What Sellers Should Do
If you sell into the U.S. through Shopify or another ecommerce platform:
- Review your nexus footprint: Identify every state where you have economic nexus or marketplace obligations.
- Check your tax settings: In Shopify, go to Settings > Taxes and Duties > United States and confirm that “Collect Sales Tax” is enabled for each state.
- Don’t assume automation = compliance: Platforms calculate tax, but it’s your responsibility to configure the rules correctly.
- Use a tax automation partner: TaxCloud can help ensure that every state’s rules are applied accurately and updated automatically.
Other US Sales Tax Updates
Mecklenburg County sales tax rate increases to 8.25% in 2026
If you sell taxable goods in Mecklenburg County, North Carolina, your sales tax rate will increase. A new 1.00% county tax brings the total rate to 8.25%, effective July 1, 2026. Here’s what you need to update before the change takes effect.
Washington, D.C. raises sales tax rate on goods and services
Washington, D.C. is raising its sales tax rate from 6% to 6.5% soon on tangible goods and a wide list of taxable services (like data processing, information services, landscaping, and health clubs). If you sell into the District, this means higher effective costs for customers today—and another jump to 7% is coming in 2026.
Santa Clara County, CA adds new 0.625% sales tax
Voters have approved Measure A, adding a 0.625% general sales tax in Santa Clara County effective April 1, 2026. The new rate will remain in place for five years.